Red Cross Youth is an extracurricular activity that guides students to build personality character, social awareness, and healthy lifestyle. The character building of this extracurricular activity is inseparable of social science teacher’s role that is taught through subject of social science. In the learning process of social science contained social values that would make students better in understanding to behave an act for society.

The aims of this research are: (1) To understand the lines and implementation of Red Cross Youth activity in build social awareness and healthy lifestyles in MAN Babat. (2) To understand the obstacles those are faced to build social awareness and healthy lifestyle of the students through Red Cross Youth activity in MAN Babat. (3) To understand the roles of Red Cross Youth activities in build social awareness and healthy lifestyles of students in MAN Babat.

This study implement qualitative approach specifically qualitative descriptive. The instrument of this research is researcher herself. Object of the study are members of Red Cross Youth of MAN Babat that are numbered 54 and 35 students as the informant. The writer applied observation, questioner, and documentation as data collection technique. Technique of checking the validity of data is source triangulation. And techniques of analysis data are by data reduction, presenting data, and take conclusion.

The results of the research show: (1) Lines and implementation of Red Cross Youth consist of routine and period activities. Routine activities take in: material, gym, reading holy Koran, maintaining the cleanness of field, picket for school health unit, Friday cleanness, and healthy socialization. Period activities take in: out bond, training, contests, joint Red Cross Youth exercises of East Java, world HIV/AIDS day, blood donors, and social service. Routine activities are done five days on a week, Tuesday to Saturday. While period activities done in certain events, and some other done once a year. (2) The obstacles faced by students are internal and external obstacles. Internal obstacles include lack of student’s awareness of discipline. While external obstacle include lack of infrastructures, others students support, and socialization of Department of health. (3) Extracurricular of Red Cross Youth has important roles to build social awareness and healthy lifestyles. The process of character building is by applying the values of social science subject into daily life through activities of Red Cross Youth.